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Nissan Murano Catalytic Converter

Nissan Murano Catalytic Converter Diagnosis Corner

The catalytic converter in your Nissan Murano is built to properly expel the impurities the engine emits. In time however, many factors such as old age, physical damage, and clogs affect its performance. This in turn leads to various car problems such as noises under the vehicle, engine overheating, and failing your emission test. If these issues show up, then spend some time diagnosing your catalytic converter before worse problems come up. Listed below are some common troubles your Nissan Murano encounters related to catalytic converters, as well as their causes:


If you start to feel something rattling or shaking in your vehicle, check your catalytic converter if it has shrunk in size. This happens when it completely heats up, then immediately comes into contact with something of an extreme opposite temperature, like snow or really cold water. This creates cracks around the car part, forcing the housing to adapt by contracting. If you drive around cold climates, then there are high chances of this happening. If this is the case, then just simply replace the housing and the noise would stop.


When your car tends to overheat and you experience a decrease in fuel economy, your catalytic converter might be plugged. This problem restricts the flow in your exhaust system, increasing the backpressure and lowers the maximum speed your vehicle achieves. If unchecked, your engine will continue to run hot and possibly go bust, adding more problems. What you should do is take out the converter and flash a light on one end. If you are barely able to see anything or not at all through the honeycomb, then it is clogged and you might need to replace your catalytic converter.

Emission problems

Higher than normal emissions, as well as them developing a rotten smell, is likely the result of a substance contaminating the catalytic converter. There are various causes to this, such as an overly rich mixture of fuel from the engine, or a foreign substance such as antifreeze, oil and sealant entering the exhaust flow. Any of these would greatly damage your catalytic converter. If you see these kinds of problems, then it is probably time to replace your catalytic converter.

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  • A Few Ways to Keep Your Nissan Murano Catalytic Converter in Tiptop Shape

    Being able to effectively minimize the toxicity of your gas emissions is the job of your Nissan Murano's catalytic converter. As time goes on, however, it slowly gets worn down. Add to that physical damage and various other internal issues and car problems will eventually come up. These come in the form of overheating, unwanted vibrations, and unsafe emissions. So if you want to prolong the life of the Nissan Murano's catalytic converter, then here are some maintenance tips to help you do so:

    • Insert screws or wires to stop rattles
    • If you want to fix the rattling noises your catalytic converter makes, a good solution is to put some screws or wires to hold the part firmly in place. If you choose to go with screws, first make a hole using a power drill and then insert large drywall screws around the loose areas. If the catalytic converter is too brittle, however, do not do this, else the honeycomb material might crack. If you are worried about that, all you need to do is insert about a foot or so of copper wire inside to act as filler for spaces.
    • Reapply catalysts and wash coat
    • Sometimes, problems regarding your catalytic converter are caused by a reduced catalyst or a depleted wash coat. All you need to do if this is the case is to simply reapply them. Take note, though, that doing this requires a good amount of car knowledge. It should only be done if you are confident enough in your DIY skills. Done incorrectly, you might totally damage the whole part, and replacement becomes the only option.
    • Check for signs of damage
    • Dents, holes, and other kinds of physical damage can be done to the catalytic converter due to factors such as uneven roads, high amount of debris, and so on. With some soldering and welding know-how, as well as a soldering iron and a torch, they can be fixed easily. However, you need to be very careful not to damage the honeycomb structure inside the catalytic converter. Any harm done to the honeycomb will render the catalytic converter unusable. Make sure you work around this part when doing repairs.